Citation: Xiaoqiang Wang, Fangyuan Zhou, Yue Liu, Zhongbiao Wu. CePO₄ supported Cr catalyst with superior sulfur tolerance for selective catalytic oxidation of ammonia[J]. Chinese Chemical Letters, ;2025, 36(7): 110420. doi: 10.1016/j.cclet.2024.110420 shu

CePO₄ supported Cr catalyst with superior sulfur tolerance for selective catalytic oxidation of ammonia

Xiaoqiang Wang ^{a, b} ,
Fangyuan Zhou ^a ,
Yue Liu ^a,, ,
Zhongbiao Wu ^a

a.
Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China
b.
College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing 314001, China

Corresponding author: Yue Liu, yueliu@zju.edu.cn
Received Date: 17 April 2024
Revised Date: 29 July 2024
Accepted Date: 5 September 2024
Available Online: 20 September 2024

Figures(4)

In this study, novel CePO₄ supported Cr catalyst was applied to eliminate slipping NH₃ from stationary sources in the presence of SO₂. Experimental results revealed that over 85% NH₃ conversion and well N₂ selectivity could be achieved on Cr/CePO₄ catalyst within 300–450 ℃ after 20 h reaction running in the presence of SO₂. Importantly, superior SCO activity (about 95%) could be maintained during the stability test. Characterization results indicated that active Cr sites could form strong interactions with acidic CePO₄ support on Cr/CePO₄ catalyst, which slightly suppressed reactivity of active Cr species but showed enhanced surface acidity. Importantly, the existed strong interactions and enhanced surface acidity significantly impeded the adsorption and oxidation process of SO₂, which weakened the deposition and thermal stability of sulfate species and retained more active sites to participate in SCO reactions, thereby enhancing sulfur tolerance of Cr/CePO₄ catalyst. Such findings could pave a new way for development of highly efficient SCO catalysts with well sulfur tolerance for real application.
- NH₃-SCO,
- Cr based catalysts,
- CePO₄,
- Sulfur tolerance,
- Long-term stability
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沈阳化工大学材料科学与工程学院沈阳 110142

CePO4 supported Cr catalyst with superior sulfur tolerance for selective catalytic oxidation of ammonia

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通讯作者: 陈斌, bchen63@163.com

CePO₄ supported Cr catalyst with superior sulfur tolerance for selective catalytic oxidation of ammonia